405992244 has 72 divisors (see below), whose sum is σ = 1137577728. Its totient is φ = 112250880.

The previous prime is 405992233. The next prime is 405992261. The reversal of 405992244 is 442299504.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7092 + ... + 29364.

Almost surely, 2^405992244 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 405992244, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (568788864).

405992244 is an abundant number, since it is smaller than the sum of its proper divisors (731585484).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

405992244 is a wasteful number, since it uses less digits than its factorization.

405992244 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22325 (or 22316 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 39.

The square root of 405992244 is about 20149.2492167822. The cubic root of 405992244 is about 740.4673478323.

The spelling of 405992244 in words is "four hundred five million, nine hundred ninety-two thousand, two hundred forty-four".